Question: Tell me physical theory  whose name has the word theory in it.
Paraphrase: Let me know physical hypothesis whose title has the word hypothesis in it.
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q9357058 . ?sbj rdfs:label ?sbj_label . FILTER(CONTAINS(lcase(?sbj_label), 'theory')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
Answer: M-theory, M-theory, mean field theory, mean field theory, Density wave theory, Density wave theory, Ginzburg–Landau theory, Ginzburg–Landau theory, Wave theory of light, Wave theory of light, cosmological perturbation theory, cosmological perturbation theory, Second Order Theory in Structural Analysis, Second Order Theory in Structural Analysis, theory of everything, theory of everything